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• Sequoia 680 Chesapeake Drive Redwood City CA 94063 (4 15) 364 9600 FAX(415) 364 9233 <br /> + �"�� y 404 N Wiget Lane Walnut Creek CA 94598 (5W) 988 9600 FAX(510)988 9673 <br /> Q * Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (9t6) 921 9600 FAX(916)921 0100 <br /> 0 <br /> Pacific Environmental Group Client Project ID 930-031 21 /434, Lodi <br /> 11315 Sunrise Gold Circle, Ste M Matrix LIQUID <br /> Rancho Cordova, CA 95742 <br /> Attention Greg Barclay Work Order# 9605810 01-03, 05, 06 Reported May 23, 1996 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> OC Batch# GCO51596BTEX22A GCO51596BTEX22A GCO51596BTEX22A GCO51596BTEX22A <br /> Analy Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Prep Method EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst T Tran T Tran T Tran T Tran <br /> M S/MSD # 960559906 960559906 960559906 960559906 <br /> Sample Conc N D N D N 0 N O <br /> Prepared Date 5/15/96 5/15/96 5/15/96 5/15/96 <br /> Analyzed Date 5/15/96 5/15/96 5/15/96 5/15/96 <br /> Instrument I D #, GCHP22 GCHP22 GCHP22 GCHP22 <br /> Conc Spiked. 10ug/L 10ug/L lopg/L 30Ng/L <br /> Result 10 95 9 5 28 <br /> . MS % Recovery 100 95 95 94 <br /> Dup Result 93 95 93 29 <br /> MSD % Recov 93 95 93 97 <br /> RPD 73 00 21 28 <br /> RPD Limit 0-25 0-25 0.25 0-25 <br /> LCS # BLK051596 BLK051596 BLK051596 BLK051596 <br /> Prepared Date 5/15/96 5/15/96 5/15/96 5/15/96 <br /> Analyzed Date 5/15/96 5/15/96 5/15/96 5/15/96 <br /> Instrument I D #. GCHP22 GCHP22 GCHP22 GCHP22 <br /> Conc Spiked long/L 10pg/L 10pg/L 30Ng/L <br /> LCS Result 96 97 96 29 <br /> LCS % Recov 96 97 96 97 <br /> 60-140 60-140 60-140 60.140 <br /> LCS 70-130 70-130 7x130 70-130 <br /> Control Limits <br /> Quality Assurance Statement All standard operating procedures and quality control requirements have been met <br /> Please Note <br /> The LCS is a control sample of known Interferent free matrix that is analyzed using the same reagents <br /> 710:ANALYTIC L preparation and analytical methods employed for the samples The matrix spike is an aliquot of sample <br /> fortified with known quantities of specific compounds and subjected to the entire analytical procedure If <br /> the recovery of analytes from the matrix spike does not fall within specified control limits due to matrix <br /> 1..r interference the LCS recovery is to be used to validate the batch <br /> Claudia Hirotsu <br /> Project Manager "MS=Matrix Spike MSO=MS Duplicate RPD=Relative%Difference 9605810 PPP <1> <br /> h� <br />